I'd like to request that the table at https://en.wikipedia.org/wiki/Special:AbuseFilter (eg, this applies to other wikis to) be sortable. Currently it can only be viewed by Filter Id, either increasing or decreasing. Ideally, one should be able to sort based on "Last modified", "Hit count", (which should be the easiest to implement) and eventually status, actions, and public description.
@DannyS712 Please note that most of the things you requested are already available: the table on Special:AbuseFilter is currently sortable by ID, enabled status, last edit, hidden status, filter group and hit count. According to your list, we're only missing actions and public description. However, sorting is performed internally by TablePager, so while it's very simple to make a field sortable (it just has to be added to a list), sometimes it's not feasible due to technical limitations which would require more work than expected. If that's the reason why those fields aren't currently sortable (I'd have to check to confirm), don't expect them to be made sortable too soon...
The public description is done above, while no hope for the actions. Mostly because, you know, ordering by a list of comma-separated values doesn't really make sense... I just checked that you would get a meaningless sorting.
I think the arrow is there for a reason, i.e. to signal that the table is sorted by that field. When you open Special:AbuseFilter, the table is automatically sorted by filter ID in ascending order, hence the arrow there. At that time, that's the only existing order, and other fields are just random, so they don't have any arrow. At any rate, this would be a core change which needs a separate ticket.
This is... really, really counter intuitive. When you load the page, only "▼ Filter" indicates that it could be sorted. Every other sortable column lacks the normal sorting icon which looks kinda a superimposed 🞁/🞃 (see https://en.wikipedia.org/wiki/Help:Sorting#Sortable_looks). Also clicking on a wikilink is completely unintuitive, given you expect to be taken to a different page.